4 Channel Relay Module For Arduino 5V / 12V With 1 Year Warranty

4 Channel Relay Module For Arduino 5V / 12V With 1 Year Warranty

Description:

1.The power source and the relay system power can be divided

2. A set of jump cap. Jump hat off. Can separate the power supply

3. Only one way of high level can be triggered

4.The input signal can be 3.3 V 5 V

5. Are low level effective. Support 3.3V 5 V

6. It has jump line. Can set high and low level

Specification:

Package Including:

1*Relay Module 

 test code:

int BASE = 2; / / first a relay connected to I / O pins
int NUM = 4; / / the total number of relay
void setup ()
{
for (int i = BASE; i <BASE + NUM; i + +)
{
pinMode (i, OUTPUT); / / set the digital I / O pin as an output
}
}
void loop ()
{
for (int i = BASE; i <BASE + NUM; i + +)
{
digitalWrite (i, LOW); / / set the digital I / O pin output is "low", that is gradually closed relay
delay (200); / / delay
}
for (int i = BASE; i <BASE + NUM; i + +)
{
digitalWrite (i, HIGH); / / set the digital I / O pin output is "low", that gradually open relay
delay (200); / / delay
}
}

Factory Pictues

Competitive Advantage:

1. Convenient & Friendly Customer Service
2. Low Prices Direct From Factory Suppliers
3. Fast Delivery Around the World. 
4. High Quality With Global Standards. 
5. 1 Year Factory Warranty
6. Safe Shipping Way and Payment